We revisit the far from equilibrium escape problem across a fluctuating potential barrier that is driven by asymmetric, unbiased dichotomous noise. Our closed analytical solution for arbitrary noise strengths reveals new aspects of the so-called ‘‘resonant-activation’’ effect and leads to interesting implications regarding far from equilibrium or externally controlled chemical reaction processe...

As a type of dam with long history and wide range in the construction water conservancy projects my country, weir dams have functions flood control, irrigation diversion. Due to limitation conditions environment at that time, treatment is not standardized enough, which leads different degrees problems dam. Based on example Shangmaji weir, article focuses analysis leakage damage mechanism propos...

Andean ecosystems provide important hydrological services for downstream communities. Due to this importance, several studies have been carried out in recent years, with emphasis on processes identification and land use change impacts. In studies, but also the operation of small-scale irrigation drinking water projects, small streams equipped compound, sharp-crested weirs discharge estimation. ...

Purpose. The research purpose is to develop a mathematical model of pressureless flow in channel with the occurrence some areas overflow layer through wall. Using this model, it possible calculate height and length, as well change rate due withdrawal part fluid result overflow. Methods. uses comprehensive multi-stage analytical approach. Firstly, order for wall, analytically determines dependen...

Schistosomiasis is a parasitic disease mostly found in areas along the Changjiang River, Oncomelanias is the only intermediate host of schistosomiasis. Oncomelania entering into farmland or the residential zones through the flood discharge or irrigation system is the main reason of spreading schistosomiasis. Therefore it is most essential and effective way to control diffusion of oncomelanias a...

Accurate measurement of stream flow is an important component of environmental water quality monitoring. Flow rates in small streams can be conveniently monitored using weirs. The objective of this study was to design, install, and calibrate a series of permanent compound weirs for use in monitoring flow and water quality in a first order riparian wetland stream that exhibited great variability...